However, the rudimentary state of the reticulo-rumen and omasum, presence of the esophageal groove (Church, 1988), plus the developing abomasal and intestinal enzymatic state forces neonatal ruminants to function as monogastric animals (Longenbach and Heinrichs, 1998) subsisting on milk-based diets, which are digested assimilated quite efficiently (Davis and Drackley, 1998).